eSIM vs SIMカード vs ローミング比較
SIMカードや国際ローミングと比べて、eSIMでどれだけ節約できるかをご確認ください。
旅行シナリオを選択
コストと設定の比較
旅行eSIM
現地SIMカード
キャリアローミング
機能別比較
| 機能 | eSIM | 現地SIMカード | キャリアローミング |
|---|---|---|---|
| Instant setup (under 2 min) | |||
| Keep your home number active | |||
| No physical card needed | |||
| Buy before your trip | |||
| Works across multiple countries | |||
| No hidden fees or bill shock | |||
| Full local 4G/5G speeds | |||
| No contract or commitment | |||
| Local phone number included |
なぜ旅行にeSIMを選ぶべきか？
Instant Activation
Purchase online, scan the QR code, and you're connected in under 2 minutes. No airport queues, no store visits.
Save Up to 90%
Travel eSIM plans cost a fraction of carrier roaming. Save hundreds of dollars on every international trip.
Secure & Reliable
Same carrier networks as local SIMs, same encryption standards, same speeds. Your data is fully protected.
よくある質問
Is eSIM data speed slower than a local SIM card?▾
No. Travel eSIM connects to the same carrier networks (e.g., NTT Docomo in Japan, Vodafone in Europe) at the same speeds. There is zero technical difference in data speed between eSIM and physical SIM.
Can I keep my home phone number while using eSIM abroad?▾
Yes! That's one of the biggest advantages. Your eSIM runs as a second line alongside your home SIM. You receive calls and texts on your regular number while using the eSIM for data.
What happens if I run out of eSIM data during my trip?▾
You can instantly purchase a new eSIM plan through MyeSIM at any time. The new plan activates in under 2 minutes — no need to find a store or go without internet.
Do I need to unlock my phone to use a travel eSIM?▾
If your phone is carrier-locked (purchased through a carrier payment plan), you may need to request an unlock first. Most phones purchased at full price or directly from the manufacturer are already unlocked.
Which devices support eSIM?▾
Most modern smartphones support eSIM: iPhone XS and later, Samsung Galaxy S20 and later, Google Pixel 3 and later, and many other flagships. Check our compatible devices guide for the full list.
次の旅行で節約しませんか？
200以上の国と地域のeSIMプランをご覧ください。即時アクティベーション、$1.99から。